Vending-machine.



C. S. HARDY.

VENDING MACHINE.

APPLIGATION FILED 111111.12

1m Patented sept. 12,1911.

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ArroR/vfrs C. S. HARDY.

VBNDING MACHINE APPLICATION FILED AUG. 12, 1909.

Patented Sept. 12, 1911.

` ATTO/ME YS WITNESS/58 recense,

vie

UNITED STATES PATENT OFFICE.

CHARLES S. HARDY, F SAN DIEGO, CALIFORNIA.

VENritira-1uncHINn.

Specification of Letters Patent. Patented Sept,

Application filed August 12, 1909; Serial No. 512,475.

Y hereinafter described and claimed.

r1`he object of the invention is to provide a device of the character specied which will dispense accurately measured quantities of liquid, without the necessity of an attendant, and which will be operated bythe liquid, under pressure.

A further object is to provide a'device wherein the amount dispensed may be varied, by varying the capacity of the pump. Referring to the drawings forming a part hereof: Figure 1 is a vertical transverse section on the line l-d of Fig. 2. Fig. 2 is a sectional view, the casing and a part of the coin chute being shown in section and some parts in elevation. Fig. 3 is a section similar to Fig. 1 showing a somewhat similar construction to that presented in Fig. 1. Fig. t is an end view partly in section of a portion of the construction shown in Fi 3.

rllhe .embodgiment of the invention shown in the drawingsl comprises a suitable casing 1, with which is connected one or more reservoirs or containers 2` for the liquid which' is -contained therein under pressure, and`with each of the containers is associated a pump, to be described in detail, by means of a pipe 3.

Each of the pumps consists of a barrel 4t, in which is slidable a plunger, consisting of spaced pistons 5 and 6, the pistons being each provided with a packing ring 7 on its periphery, and with a piston rod 8 and 9.

rEhe rods 8 and 9 extend in opposite direc-- tions'th'rough the heads of the barrel, and are encircled outside of the barrel by a packing 10, which is retained in position by a packing nut 11. One of the pistons 6 is provided onthe face opposite its rod with a threaded lug 12, andthe other piston 5 with a threaded socket 13, in which is received the lug so that by turning the pistons in opposite` directions, they may be moved toward or from each other, to vary the capacity of the barrel, and' hence the quantityof liquid dispensed at each stroke ofthe plunger. An arm 14 is connected with the outer end of each rod, the arm having a bearing encircling the rod and secured thereto in any suitable manner, and a rod 15 has its ends passed through the upper ends of the arms which are slotted 'as at 14El for the purpose and secured in place by lock nuts 16. The rod is supported by the arms 14, and a spiral spring 18 encircles the rod near each end, bearing at one end against one of the nuts, and at thel other against a bearing to be presently described. When the pistons are being adjustedV toward and from each other the lock nuts 16 are loosened, and after they are adjusted, the lock nuts are tightened to retain the said pistons in adjusted position.

From eachy end ofthe barrel extends a pipe 19 and 20, upwardly and inwardly to the opposite sides of a fourway valve casing 21, with whose other ports are connected the pipe 3 before mentioned, and a discharge pipe 22, which delivers the liquid at any desired point. The"^ valve is supported from the under face of the top of the casing 1 by a bracket 23, and the pipes 19 and 20 support the barrel. The plug 25 of the fourway valve is oblong in form and is cut away at each side as at 26 to form passages for connecting the adjacent y pipes with each other. As will be observed, by an-inspection of Fig. 1 the pipe 3 may be connected with either end of the barrel while the opposite end is simultaneously connected with the discharge pipe 22, so that while the Huid under pressure is entering one endof` the barrel and forcing the plunger toward. the opposite end, the liquid therein is permitted tc low out 'at the discharge pipe.

The plug 25 is operated by means of a valve rod or handle 27 rigidly connected to the stem 25a thereof, and extending radially therefrom, and the free end of the rod is provided withv a head 28 which is normally.

engaged by a roller 29, journaled in a bracket 30 on' a trip rod 31, which 1s Jourlialed longitudinally of the barrel. The valve rod 27 is provided with a fork 27', which 'engages the spool 17. The sald spool 17 slides on the rod 15 and its enlarged ends 37`alternate1yengage the inner ends of the springs 18. The trip rod 31 rotates the lever oscillates the rod and moves the roller out oi"- engagement with the head of the valve rod. lThe spring 1,8 atthe end off the barrel opposite the plunger is at this point under compression, and as soon as the valve rod is released it is thrown to the right of Fig. 1, by the expansion ofthe spring, thus reversing the position of the plug and admitting the liquid to the end of .the barrel .adjacent to the plunger, while the opposite end is connected with the discharge pipe. The liquid being under pressure moves the piston and causes the delivery ofthe contents of the barrel 4. The barrel is always illed, and as the plunger moves to the left of Fig. l, a` charge is forced out of the barrel. As Vsoon as the coin passes the lever, said lever swings back into the chute, and returns the trip rod to its original position, so that the roller at the other end of the rod 31' engages the headof the valve rod, to prevent a return-move. ment thereof, until it is again released by the insertion of another coin. The spring v18 does not begin to be compressed `until the head is engaged with the roller, and is not closely compressed until the plunger has completed its movement, and the head is conical in shape, so that it' will not easily become disengaged. When it is desired to vary the capacity of the barrel, the lock nuts 16 are released, and the pistons are turned in o posite directions, to move them toward or om each other. When adjusted the nuts are again locked. The'slide'rod 15 must be moved toward or from the stem 25a so that the stroke of the valve stem will be the same, and the slotted arrangement of the radial arms 14 ermits this movement.

It will be evi ent that the casing may be provided with anynumber of reservoirs and barrels,` and that one barrel may be connected to more than one reservoir if so desired. In Figs. 3 andi' 4, a 'somewhat modifiedform is shown. Inl this embodiment the tripping lever 40 extends upwardly alongside the chute 41 and is provided with a cam portion 43, which extends through the slot 46 into the chute. In Figs. 3 and 4 the tripping rod 31 is supported at the'top of` the caslng, andthe valve' rod 48 of the four way .valve extends upwardly instead of downwardly.v The remainder of the construction is however, the same, and the device operates in the same manner. l

I' claim:

1. A device of the character specified comprising a casing, a reservoir for liquid plunger therein, rods connected with the plunger and extending through the ends. of the barrel, a radial arm connected with each of the rods, a slide rod connecting the outer ends of the arms, a four way valve casing having a discharge port, and having ports communicating with the ends of the barrel and with the reservoir, a plug in the valve casing, a valve rod for controlling the' plug, said valve rod having at its outer end a head, and engaging intermediate its ends with a spool through which extends the slide' rod, a spring encircling the slide rodfateach .end thereof, said springs bearing at their outer ends against the adjacent arm, the

inner end being adapted for engagement by the spool, a tripping rod rotatable in the casing, a roller at each end of the said rod for engaging the head to prevent movement of the valve rod, and a tripping lever secured to the tripping rod.

2. A device of the character specified comprising a casing, a reservoir for liquid under pressure, a barrel, a plunger therein, rods connected with the plun er and extending through the ends of the arrel a radial arm connected with each of the rods, a slide rod connecting the outer ends of the arms, a four wa valve casing having a discharge port, and avingports communicating with the ends (of the' barrel, and with the reservoir, a plug in the valve casing, a valve rod for controlling the plug, said valve rod having at its outer vend a head, and engaging intermediate its ends with a spool .through under pressure, a barrel, an adjustableY which extends the slide rod, a s ring encircling the slide rod at each en thereof,

said springs Ibearing at their outer ends the valve rod, and means for oscillating the tripping rod. Y

3. A device of the class described, comprising a reservoir for liquid under pressure,l a barrel, a plunger therein, rods .connected with the plun er and extending vthrough the ends of the arrel, a slide rod parallel with the rods and rigidly connected thereto,a four way valve having a dischar e port, and provided with means for simultaneously connecting one end of the barrel with the reservoir and the other with trollin the valve, said rodl enga' ed with a spool t rough which the slide ro passes, a spring at each endof said slide rod .'for enthe'discharge port in alternation, a rodcongaging the spool to swing the valve rod, a trip for engaging the valve rod to prevent the swinging thereof, and means for releasing the trip. l

4. A device of the class described, comprising a reservoir for liquid under pressure, a barrel, a valve for simultaneously connecting one end of the barrel with the reservoir and the other With the atmosphere in alternation, a plunger in the barrel, rods connected therewith and extending through the ends of the barrel, a slide rod rigidly connected with the ro'ds and in parallel relation thereto, a valve rod for controlling the valve and engaging with a spool through which passes the slide rod, a spring at each end of the slide rod for swinging the valve rod, means for normally restraining thel swinging movement, and means for releasing said restraining means. e

5. A device of the class described, comprising a reservoir for fluid under pressure, a fluid operated pump, said pump comprising a barrel and a plunger therein, a valve for controlling the passage ot' the Huid to and from the pump, springst'or moving the valve to admit the fluid to the opposite ends of the barrel in alternation, means for restraining the operation of the springs, and means for releasing the restraining means.

i CHARLES s. HARDY.

Witnesses:

EUGENE D. WILLIAMS, CLEMENT H. WEsCoTT. 

